:root {
  --paper: #fff7e8;
  --card: #ffffff;
  --ink: #3d342f;
  --muted: #75685f;
  --accent: #e86f51;
  --accent-2: #55a98c;
  --border: #eadbc8;
  --shadow: rgba(122, 85, 55, .12);
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #211c1a;
    --card: #302824;
    --ink: #fff4df;
    --muted: #cbbcaf;
    --accent: #ff9678;
    --accent-2: #79caae;
    --border: #4b3e37;
    --shadow: rgba(0, 0, 0, .22);
  }
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background:
    radial-gradient(circle at 15% 0%, rgba(255, 202, 104, .18), transparent 28rem),
    var(--paper);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Noto Sans JP", sans-serif;
  line-height: 1.85;
  -webkit-text-size-adjust: 100%;
}
.wrap { max-width: 760px; margin: 0 auto; padding: 36px 20px 80px; }
.nav { display: flex; flex-wrap: wrap; gap: 8px 18px; margin-bottom: 28px; font-size: 14px; }
.nav a { white-space: nowrap; }
.eyebrow { color: var(--accent); font-weight: 800; letter-spacing: 2px; font-size: 13px; margin: 0 0 6px; }
h1 { font-size: clamp(28px, 7vw, 38px); line-height: 1.35; font-weight: 900; margin: 0 0 8px; }
h2 { font-size: 20px; line-height: 1.55; font-weight: 800; margin: 34px 0 10px; }
.lead { font-size: 17px; }
.updated { color: var(--muted); font-size: 13px; margin: 0 0 16px; font-weight: 600; }
p, li { font-size: 15px; }
a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 3px; font-weight: 700; }
ul { padding-left: 1.3em; }
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 20px 22px;
  margin: 20px 0;
  box-shadow: 0 8px 24px var(--shadow);
}
.card h2 { margin-top: 0; }
.actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
.button { display: inline-block; color: #fff; background: var(--accent); border-radius: 13px; padding: 10px 16px; text-decoration: none; }
.button.secondary { background: var(--accent-2); }
.note { color: var(--muted); font-size: 13px; }
footer { color: var(--muted); font-size: 13px; margin-top: 44px; }
@media (max-width: 520px) {
  .wrap { padding: 24px 16px 64px; }
  .card { padding: 18px; }
}